From d0af1c711609b1f5405c0ac8010e5e4b4bae02ce Mon Sep 17 00:00:00 2001
From: "Kenneth Benzie (Benie)" <benie@infektor.net>
Date: Tue, 31 May 2022 10:57:28 +0100
Subject: [PATCH] Fix Doxygen @param highlight

There are two forms of `@param`:

* `@param <name> <description>`
* `@param[<use>] <name> <description>`

Prior to this patch only the latter was highlighting `<name>` as a
special comment, now both forms do this.
---
 after/syntax/c.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/after/syntax/c.vim b/after/syntax/c.vim
index 5996c7a..12b7f7c 100644
--- a/after/syntax/c.vim
+++ b/after/syntax/c.vim
@@ -45,7 +45,7 @@ if exists('g:c_doxygen') && g:c_doxygen
 
   " Match: @param name description.   @retval name description.
   "               ^^^^                        ^^^^
-  syn region cDoxygenSpecial matchgroup=cDoxygenComment start='@\(param\(\[\(\|in\|out\|in,out\)\]\)\|retval\)\=\s\+' end='\(\s\|$\)' contained display
+  syn region cDoxygenSpecial matchgroup=cDoxygenComment start='@\(param\(\[\(\|in\|out\|in,out\)\]\)\?\|retval\)\=\s\+' end='\(\s\|$\)' contained display
 
   " Match: @tparam name description.
   "                ^^^^